夏季青藏高原对流激发重力波的大涡模拟研究

大气重力波是中高层大气最重要动力学过程之一，因波破碎造成的物质传输过程和能量的空间再分配，会对全球平流层-对流层交换（STE）和能量平衡产生重要影响。而青藏高原地区由于特殊的动力、热力效应，在调节全球气候变化方面扮演着重要的角色。本项目聚焦夏季青藏高原对流激发的重力波，结合台站观测资料、再分析资料和高分辨率大涡模式研究夏季青藏高原地区对流激发的重力波特征，重点分析青藏高原对流激发重力波的触发机制、传播特征和破碎特性，同时，探讨对流重力波触发和破碎条件下的高层大气环境特征。在此基础上，解析青藏高原对流激发的重力波活动影响STE的机理，为研究青藏高原重力波和STE过程提供参考依据。

Atmospheric gravity waves are one of the most important dynamical processes in the middle and upper atmosphere. The spatial redistribution of energy and a series of material transport processes due to wave broken have important implications for global stratosphere and troposphere exchange (STE) and energy balance. The Tibetan Plateau plays an important role in regulating global climate change due to its special dynamic and thermal effects. By using observation data, re-analysis data and high-resolution large eddy simulation, this project will study the characteristics of convectively generated gravity waves over the Tibetan Plateau in the summer and analyze triggering mechanism, propagation characteristics and broken characteristics of convectively generated gravity waves. At the same time, the characteristics of the upper atmosphere while convective gravity wave triggering and breaking are discussed. On these basis, we analyze the intensity and influence range of air turbulence induced in the UTLS region after the gravity wave broken over the Tibetan Plateau, and investigate the mechanism of the influence of the convectively generated gravity wave on STE. The research results of this project can provide some reference for studying the gravity waves and STE on the Tibetan Plateau.